Basis of Presentation and Signficant Accounting Policies Adoption of New Accounting Pronouncement (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Adoption of New Accounting Pronouncement [Abstract]
Patient Protection Affordable Care Act Health Insurance Provider Fee, annual amount to be collected by the Government through assessments to all health insurers subject to the fee	$ 8,000.0	$ 8,000.0
Patient Protection Affordable Care Act Health Insurance Provider Fee, amount paid		893.3
Patient Protection Affordable Care Act Health Insurance Provider Fee expense recognized	$ 210.0	$ 670.0